RightTupleList rightTuples = query.getRightTupleList();
if ( rightTuples == null ) {
rightTuples = new RightTupleList();
query.setRightTupleList( rightTuples );
QueryEvaluationAction evalAction = new QueryEvaluationAction( context,
this.factHandle,
leftTuple,
this.node );
context.getQueue2().addFirst( evalAction );
}